On May 24, 2009, at 5:50 PM, MacGuy wrote:

> anybody familiar with a make / model video camera that has firewire
> and "pass-thru" to work as a webcam?

I don't think you're using the term "pass-thru" correctly? In older DV  
camcorders, the input jacks were analog RCA jacks, and the term "pass- 
thru" was used to pass the analog input from these jacks through the  
analog-to-digital (DV) conversion circuitry and then output that  
digital DV stream over the digital Firewire port (Sony calls Firewire  
"iLink"). So "pass-thru" was a way of having the camcorder act as an  
analog-to-digital convertor in "real time". This also meant that any  
analog video source, such as an analog webcam, or a VCR, or an analog  
TV signal could be converted to digital in real time by the "pass- 
thru". In this case, the lens and input from the camcorder are NOT  
active, and the lens cap can be on the camcorder.

I believe what you're asking is something much simpler than "pass- 
thru", I believe you're just wanting to use the camcorder as a webcam  
without recording the session? I don't think this passive output mode  
is called "pass-thru"? I'm not sure what it's called, but I'd imagine  
most modern digital camcorders can do this? It'd be "live output"  
without recording, perhaps having some other name?

Older Sony camcorders were of a variety whereby many different models  
were all the same camcorder, and the firmware controlled the number of  
functions available. In most cases it was possible to reprogram the  
firmware to enable all the functions of the high-end camcorder on the  
low-end model, BUT, this was a complicated undertaking requiring  
special homemade cables, a Windows PC, and enough knowledge of basic  
programming to be able to recalculate a hexadecimal "checksum". The  
program for enabling analog-to-digital "pass-thru" is called Anin.exe  
and is available here:

<http://www.sps.volyne.cz/set1394/anin/analog.html

This site in Czechoslovakia is a little hard to navigate, but most of  
the information is here if you dig around. This isn't a project for  
newbies to undertake, and new camcorders are so cheap and small that  
unless you already owned a low-end Sony and wanted to convert it to a  
high-end, I can't see any reason to undertake such a tough project.

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